Fix commit url for Azure Devops repos

[AchimStuy]

We are managing source code through Azure Devops. This uses another url scheme when browsing commits:

https://dev.azure.com/organization/project/_git/repo?version=GCcommit

instead of

https://github.com/user/project/tree/commit

See https://www.nuget.org/packages/Visi.Extensions as example.

[AchimStuy]

Silly me, sorry! It's GCcommit. Edited my PR description.

[AchimStuy]

~I just saw, where th GBcommit came from: We have an on premise Azure Devops Server. There the link is built with GBcommit. But https://dev.azure.com is definitely built with GCcommit.~

No it's not. At on premise Azure Devops Server, it's also built with GCcommit. But GBbranch is used for branches.